You need to remove all insulation and completly replace it with new 1 inch wall insulation and all seams need to be thoroughly glued to prevent air introution .Which creates condensation.The best way to do it is to pump down the unit and cut the pipe the slide it on.Instead of cutting the insulation length ways.But you'll need a vaccum pump and a torch,Or a technician if you need one of those pm me ill do it for cheap and you will never have that issue again
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